What fish can live with Golden Wonder Killifish?

Use the "Often compatible" lists as a shortlist, not a stocking plan. Always run the pair tool and check the footprint of your actual tank first. Verify behaviour for Golden Wonder Killifish against your own reading before you buy.

What tank mates should you avoid with Golden Wonder Killifish?

Avoid Neon Tetra, Guppy, Cherry Shrimp, Ember Tetra based on size, temperament, or predation risk on file.

What size tank do Golden Wonder Killifish need for a community?

80L is the planning floor for adult swimming space and bioload headroom. Long-term, a 100L+ tank lets adults use the full footprint without crowding the next species. Footprint, meaning length and front-to-back depth, matters as much as raw volume for active or territorial species.

Golden Wonder Killifish tank mates

A surface micropredator with a misleading killifish label. Species-only or mid-size community, never with nano tetras or shrimp. Cover the tank.

Evidence: partially verified

Confidence: medium

Lists below are built from this species record (safest, best with, risky, unsafe) — each link opens a pair-level check, not a guarantee.

← Full Golden Wonder Killifish profile·Compatibility checker·Tank builder·More oddball

Best tank mates (on file)

Merged from conservative safest and best with fields — de-duplicated by species.

Bristlenose Pleco Pair check
The Golden Wonder Killifish profile lists Bristlenose Pleco as both safe and a recommended pairing. Bristlenose Pleco swims in the bottom zone while Golden Wonder Killifish stays in the top, so the two will not crowd the same water column.
Corydoras Catfish Pair check
The Golden Wonder Killifish profile lists Corydoras Catfish as both safe and a recommended pairing. Corydoras Catfish schools in groups of 6 or more, so plan room for the whole group rather than one fish. Corydoras Catfish swims in the bottom zone while Golden Wonder Killifish stays in the top, so the two will not crowd the same water column.
Harlequin Rasbora Pair check
The Golden Wonder Killifish profile lists Harlequin Rasbora as both safe and a recommended pairing. Harlequin Rasbora schools in groups of 6 or more, so plan room for the whole group rather than one fish. Harlequin Rasbora swims in the middle zone while Golden Wonder Killifish stays in the top, so the two will not crowd the same water column.

Risky or situational

From risky tank mates and broad avoid with (excluding “unsafe” below). May work with species-only setups, more water, or mature systems — read the pair page.

Dwarf Gourami Open pair check
Marked risky or situational on the profile. Tank length and group size change the outcome more than a temperament label does.

Fish to avoid with Golden Wonder Killifish

From the unsafe list — predation, aggression, or space rules on this profile.

Neon Tetra See why (pair)
Golden Wonder Killifish is flagged as predatory or as likely to eat small fish, and Neon Tetra at 4cm is well within an adult Golden Wonder Killifish's gape.
Guppy See why (pair)
Golden Wonder Killifish is flagged as predatory or as likely to eat small fish, and Guppy at 5cm is well within an adult Golden Wonder Killifish's gape.
Cherry Shrimp See why (pair)
Golden Wonder Killifish is flagged as predatory or as likely to eat small fish, and Cherry Shrimp at 2.5cm is well within an adult Golden Wonder Killifish's gape.
Ember Tetra See why (pair)
Golden Wonder Killifish is flagged as predatory or as likely to eat small fish, and Ember Tetra at 2cm is well within an adult Golden Wonder Killifish's gape.

Tank size and groups

Published minimum for Golden Wonder Killifish: 80L — group minimum 1 .
Compatibility changes when the tank is too short for turning, too little for a real school, or too warm for one species and not the other — that is why pair checks include tank context, not only temperament.
Nearest litre hub to this minimum: 80L hub.

Easier alternatives to consider

Conservative beginner-peaceful picks from the library — not replacements for reading, but a shorter on-ramp than this species for a first tank.

Plan before you buy

Pair checks for every mix, then multi-species stocking in the builder.

Open compatibility checker Tank builder

Filtration & heating

A 80L minimum tank for Golden Wonder Killifish needs a filter rated for at least 320L/hr turnover and a heater maintaining 22–28°C.

Filter buying guide →Heater buying guide →Beginner plants guide →